A forestry seedling cultivation soil covering and compacting device

Abstract

The application provides a forestry seedling cultivation soil covering and compacting device, and relates to the technical field of forestry seedling cultivation equipment. The device comprises a rack, a hardened soil crushing assembly and an independent elastic pressure covering assembly. The hardened soil crushing assembly comprises a support arm connected to the rack, and a walking wheel is installed on the support arm. A first support is connected to one side of the rack. In the application, the crushing roller rotates synchronously with the device, crushing the hardened soil on the surface of the seedbed and creating uniform and loose soil conditions for subsequent compaction. In the independent elastic pressure covering assembly, the third hydraulic push rod adjusts the pitch angle of the second rotating frame to set the initial working height of the fan-shaped soil pressing plate. A plurality of independently arranged swing arms drive the fan-shaped soil pressing plates to adapt to the ups and downs of the ground under the pre-tightening spring pre-pressure, uniformly and elastically compacting the crushed soil, and fundamentally avoiding the uneven stress problem that easily occurs in overall rigid compaction.

Description

Technical Field

[0001] This invention relates to the field of forestry seedling equipment technology, and in particular to a soil covering and compaction device for cultivating forestry seedlings. Background Technology

[0002] In the cultivation of forestry seedlings, soil covering and compaction is a crucial step in ensuring seedling survival rates. Its function is to ensure close contact between the seedling roots and the soil, preventing root dehydration and stabilizing the seedling stems to prevent lodging. Currently, the commonly used soil covering and compaction equipment in forestry production is mostly simple roller compactors or manual trampling, which still has the following shortcomings in practical use: 1. Lack of pre-compacting soil breaking function. Direct compaction of compacted seedbed soil will lead to uneven compaction, poor root-soil bonding, and affect seedling rooting. 2. The compaction mechanism is mostly a rigid structure, which cannot avoid the stems of seedlings during operation, making it very easy to break or damage the seedlings, resulting in a decrease in the survival rate of the seedlings; 3. The compaction pressure is not adjustable, and the compaction intensity cannot be adjusted according to different seedling varieties and different soil textures. Excessive pressure will lead to poor soil permeability, while insufficient pressure will not achieve the desired fixing effect. 4. Wet soil tends to adhere to the crushing rollers during operation. If it is not cleaned in time, it will reduce the crushing efficiency or even cause jamming. 5. The effect of a single compaction method is limited. For loose soil, multiple round trips are often required, resulting in low work efficiency.

[0003] Therefore, this invention proposes a soil covering and compaction device for cultivating forestry seedlings to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a soil covering and compaction device for cultivating forestry seedlings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a soil compaction device for cultivating forestry seedlings, comprising a frame, and further comprising a soil breaking component and an independent elastic compaction component: The compacted soil breaking assembly includes a support arm connected to a frame, a traveling wheel installed on the support arm, a first support connected to one side of the frame, a first rotating frame rotatably connected to the bottom of the first support, a first hydraulic push rod for adjusting the pitch angle of the first rotating frame connected between the first support and the first rotating frame, a rotating seat rotatably connected to both ends of the first rotating frame, a support arm provided on the rotating seat, and a breaking roller rotatably installed at the bottom of the support arm; The independent elastic pressing assembly includes a second bracket connected to the other side of the frame. A second rotating frame is rotatably connected to the bottom of the second bracket. A third hydraulic push rod for adjusting the pitch angle of the second rotating frame is connected between the second bracket and the second rotating frame. A first mounting beam is connected to the bottom of the second rotating frame. Multiple mounting seats are provided in the first mounting beam. A swing arm is rotatably connected to each mounting seat. A fan-shaped soil pressing plate is rotatably connected to the bottom of the swing arm. A preload spring is connected between the mounting seat and the swing arm.

[0006] Furthermore, a second hydraulic push rod is connected between the first rotating frame and the rotating seat. One end of the second hydraulic push rod is rotatably mounted on the first rotating frame, and the other end of the second hydraulic push rod is rotatably connected to the rotating seat for adjusting the horizontal swing angle of the support arm. A connecting seat is connected to the rotating seat, and the support arm is connected to the connecting seat.

[0007] The beneficial effects of adopting the above-mentioned further solution are: the horizontal swing angle of the rotating seat can be precisely controlled by the second hydraulic push rod, so as to achieve fine adjustment of the working posture of the crushing roller. It can accurately match the inclination slope of the seedbed and local terrain changes. The cutting angle of the crushing roller can be adjusted according to the degree of soil compaction, optimize the crushing force state, improve the crushing efficiency and uniformity of compacted soil, and avoid the phenomenon of missed crushing or over-crushing.

[0008] Furthermore, a connecting shaft is connected to the crushing roller, and the connecting shaft is connected inside the support arm. A connecting frame is connected to the support arm near the bottom, and a cleaning brush is connected to the connecting frame near the crushing roller. The bristles of the cleaning brush are in contact with the outer surface of the crushing roller to clean the soil adhering to the crushing roller. A baffle is connected to the connecting frame near the bottom to block soil splashed during the crushing process.

[0009] The beneficial effects of adopting the above-mentioned further solution are: the cleaning brush is in real-time contact with the surface of the crushing roller, which can continuously scrape off the wet soil adhering to the roller body, prevent soil clumps from clogging the crushing teeth, and ensure the stability of crushing efficiency and effect. The baffle can effectively block soil particles splashed during the crushing process, protect operators and equipment, and at the same time perform preliminary leveling of the crushed soil, optimizing the subsequent compaction operation conditions.

[0010] Furthermore, the bottom of the fan-shaped compaction plate is provided with an arc-shaped compaction working surface, and both sides of the fan-shaped compaction plate are provided with clearance recesses. The clearance recesses are used to avoid the stems of the seedlings and prevent damage to the seedlings during the compaction process.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the arc-shaped compaction working surface makes the soil stress evenly distributed, avoids local over- or under-compaction, ensures consistent soil density, the side relief notches can accurately avoid the seedling stems, and with the rotational freedom of the swing arm, even if there is a slight deviation in the device's travel path, it will not crush or damage the seedlings, fundamentally solving the pain point of traditional compaction equipment easily damaging seedlings.

[0012] Furthermore, a pressure regulating assembly is provided on the top of the first mounting beam. The pressure regulating assembly includes a support seat fixedly connected to the top of the first mounting beam. A limit rod is fixedly connected to the top of the mounting seat. The limit rod slides through the first mounting beam. A return spring is sleeved on the outer side of the limit rod. The two ends of the return spring abut against the inner walls of the mounting seat and the first mounting beam, respectively.

[0013] The beneficial effects of adopting the above-mentioned further solution are: the return spring provides elastic support for the mounting base, enabling the entire compaction unit to float up and down, adapting to the undulations of the seedbed ground, ensuring that every soil area receives stable compaction pressure, and the limit rod restricts the floating range of the mounting base, preventing lateral displacement and torsion, thereby improving the stability and reliability of the structure operation.

[0014] Furthermore, a hydraulic cylinder is fixedly installed on the support base, and the piston rod of the hydraulic cylinder is connected to the top of the limiting rod. A pressure sensor is installed on the side of the support base near the limiting rod to detect the compaction pressure in real time and feed it back to the control system.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the hydraulic cylinder can precisely and steplessly adjust the compaction pressure by pushing the limit rod to change the compression of the reset spring, so as to meet the differentiated compaction needs of different seedling varieties and different soil textures. The pressure sensor collects pressure data in real time and feeds it back to the control system to realize closed-loop automatic control of compaction pressure and ensure the consistency of compaction mass during the operation.

[0016] Furthermore, an auxiliary compaction assembly is provided at the bottom outer side of the second rotating frame. The auxiliary compaction assembly includes a second mounting beam connected to the second rotating frame. An mounting shaft is connected to the side of the second mounting beam near the bottom, and a compaction roller is rotatably mounted on the mounting shaft.

[0017] The beneficial effects of adopting the above-mentioned further scheme are: after the fan-shaped soil compaction plate completes the initial elastic compaction, the compaction roller performs a second continuous rolling of the soil, which further improves the overall density of the soil, makes the seedling roots more tightly bound to the soil particles, effectively prevents the roots from being suspended and losing water, and makes the soil surface after rolling smoother, which is conducive to subsequent irrigation and seedling growth management.

[0018] Furthermore, an eccentric block is fixedly installed on one side of the compaction roller. The eccentric block vibrates as the compaction roller rotates to enhance the compaction effect. One end of the compaction roller is connected to a drive motor, which is fixed on the second mounting beam.

[0019] The beneficial effects of adopting the above-mentioned further scheme are: the eccentric block rotates synchronously with the compaction roller to generate high-frequency micro-vibration, which causes the soil particles to rearrange and fill the gaps under the action of vibration, significantly improving the compaction effect and reducing the number of operations. The drive motor provides a power source for the compaction roller, ensuring that the compaction roller has sufficient speed and torque to perform secondary compaction of the soil through vibration, causing the soil particles to rearrange and fill the gaps, further improving the density.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In this invention, when the device is in operation, the frame is connected to the power equipment through the front-end traction structure, supported by the walking wheels and moving at a constant speed along the seedbed. In the compacted soil breaking component, the first hydraulic push rod extends and retracts to drive the first rotating frame to tilt and rotate around the first support, precisely adjusting the soil penetration depth of the breaking roller. The breaking roller rotates synchronously with the movement of the device, breaking up the compacted soil on the surface of the seedbed and creating uniform and loose soil conditions for subsequent compaction. In the independent elastic compaction component, the third hydraulic push rod adjusts the tilt angle of the second rotating frame and sets the initial working height of the fan-shaped soil compaction plate. Multiple independently set swing arms, under the preload of the pre-tension spring, drive the fan-shaped soil compaction plate to adapt to the undulations of the ground, uniformly and elastically compacting the broken soil, fundamentally avoiding the problem of uneven force that is prone to occur in overall rigid compaction.

[0021] In this invention, the compaction pressure is precisely and steplessly adjusted and automatically controlled in a closed loop through a pressure regulating component. The compaction intensity can be flexibly set according to different seedling varieties and soil textures, completely solving the problem of poor soil permeability or insufficient fixation effect caused by the non-adjustable pressure of traditional equipment. The equipped self-cleaning and anti-splash devices ensure the continuous and efficient operation of the crushing roller, while improving the working environment. The recessed design of the fan-shaped compaction plate fundamentally avoids damage to seedlings during the compaction process, significantly improving the survival rate of seedlings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a soil covering and compaction device for cultivating forestry seedlings according to the present invention; Figure 2 This is a schematic diagram of the compacted soil breaking component of a forestry seedling cultivation soil compaction device according to the present invention. Figure 3 This is a structural breakdown diagram of the compacted soil breaking component of a forestry seedling cultivation and soil compaction device according to the present invention. Figure 4This is a schematic diagram of the independent elastic compaction structure of a soil covering and compaction device for cultivating forestry seedlings according to the present invention; Figure 5 This is a schematic diagram of the independent elastic compaction component structure of a forestry seedling cultivation soil compaction device according to the present invention; Figure 6 This is a schematic diagram showing the disassembled structure of the independent elastic compaction component of a soil covering and compaction device for cultivating forestry seedlings according to the present invention; Figure 7 This is a schematic diagram of the compaction component structure of a soil compaction device for cultivating forestry seedlings according to the present invention.

[0023] Figure label: 1. Rack; 2. Compacted soil breaking assembly; 21. Support arm; 22. Traveling wheel; 23. First support; 24. First rotating frame; 25. First hydraulic push rod; 26. Rotating seat; 27. Second hydraulic push rod; 28. Connecting seat; 29. ​​Support arm; 210. Breaking roller; 211. Connecting shaft; 212. Connecting frame; 213. Cleaning brush; 214. Baffle; 3. Independent elastic compaction assembly; 31. Second support; 32. Second rotating frame; 33. Third hydraulic push rod; 34. First mounting beam; 35. Mounting seat; 36. Swing arm; 37. Fan-shaped soil compaction plate; 38. Pre-tension spring; 39. Arc-shaped compaction working surface; 310. Relief notch; 4. Pressure adjustment; 41. Support base; 42. Limit rod; 43. Return spring; 44. Hydraulic cylinder; 45. Pressure sensor; 5. Compaction assembly; 51. Second mounting beam; 52. Mounting shaft; 53. Compaction roller; 54. Eccentric block; 55. Drive motor. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figures 1-6 As shown, this embodiment provides a technical solution: a soil compaction device for cultivating forestry seedlings, including a frame 1, a compacted soil breaking component 2, and an independent elastic compaction component 3. The compacted soil breaking assembly 2 includes a support arm 21 connected to a frame 1, a traveling wheel 22 mounted on the support arm 21, a first support 23 connected to one side of the frame 1, a first rotating frame 24 rotatably connected to the bottom of the first support 23, a first hydraulic push rod 25 for adjusting the pitch angle of the first rotating frame 24 connected between the first support 23 and the first rotating frame 24, a rotating seat 26 rotatably connected to both ends of the first rotating frame 24, a support arm 29 provided on the rotating seat 26, and a breaking roller 210 rotatably mounted at the bottom of the support arm 29; The independent elastic pressing assembly 3 includes a second support 31 connected to the other side of the frame 1. A second rotating frame 32 is rotatably connected to the bottom of the second support 31. A third hydraulic push rod 33 for adjusting the pitch angle of the second rotating frame 32 is connected between the second support 31 and the second rotating frame 32. A first mounting beam 34 is connected to the bottom of the second rotating frame 32. Multiple mounting seats 35 are provided inside the first mounting beam 34. A swing arm 36 is rotatably connected to each mounting seat 35. A fan-shaped soil pressing plate 37 is rotatably connected to the bottom of the swing arm 36. A pre-tensioning spring 38 is connected between the mounting seat 35 and the swing arm 36. When this device is working, the frame 1 is connected to the power equipment through the front traction structure, supported by the walking wheels 22, and moves at a constant speed along the seedbed. In the soil breaking component 2, the first hydraulic push rod 25 extends and retracts to drive the first rotating frame 24 to pitch and rotate around the first support 23, precisely adjusting the soil penetration depth of the breaking roller 210. The breaking roller 210 rotates synchronously with the movement of the device, breaking up the compacted soil on the surface of the seedbed and creating uniform and loose soil conditions for subsequent compaction. In the independent elastic compaction component 3, the third hydraulic push rod 33 adjusts the pitch angle of the second rotating frame 32 and sets the initial working height of the fan-shaped soil compaction plate 37. Multiple independently set swing arms 36, under the pre-pressure of the pre-tension spring 38, drive the fan-shaped soil compaction plate 37 to adapt to the undulations of the ground and uniformly and elastically compact the broken soil, fundamentally avoiding the problem of uneven force that is easy to occur in overall rigid compaction.

[0026] like Figures 1-3As shown, a second hydraulic push rod 27 is connected between the first rotating frame 24 and the rotating seat 26. One end of the second hydraulic push rod 27 is rotatably mounted on the first rotating frame 24, and the other end is rotatably connected to the rotating seat 26. It is used to adjust the horizontal swing angle of the support arm 29. A connecting seat 28 is connected to the rotating seat 26, and the support arm 29 is connected to the connecting seat 28. The horizontal swing angle of the rotating seat 26 can be precisely controlled by the second hydraulic push rod 27, realizing the fine adjustment of the working posture of the crushing roller 210. It can accurately match the inclination slope and local terrain changes of the seedbed. The cutting angle of the crushing roller 210 can be adjusted according to the degree of soil compaction, optimizing the crushing force state, improving the crushing efficiency and uniformity of compacted soil, and avoiding the phenomenon of missed crushing or over-crushing. A connecting shaft 2 is connected to the crushing roller 210. 11. The connecting shaft 211 is connected inside the support arm 29. A connecting frame 212 is connected to the support arm 29 near the bottom. A cleaning brush 213 is connected to the connecting frame 212 near the crushing roller 210. The bristles of the cleaning brush 213 are in contact with the outer surface of the crushing roller 210 to clean the soil adhering to the crushing roller 210. A baffle 214 is connected to the connecting frame 212 near the bottom to block the soil splashed during the crushing process. The cleaning brush 213 is in real-time contact with the surface of the crushing roller 210 and can continuously scrape off the wet soil adhering to the roller body to prevent soil from caking and clogging the crushing teeth, thus ensuring the stability of crushing efficiency and effect. The baffle 214 can effectively block the soil particles splashed during the crushing process, protect the operators and equipment, and at the same time perform preliminary leveling of the crushed soil to optimize the subsequent compaction conditions. like Figures 4-6 As shown, the bottom of the fan-shaped compaction plate 37 is provided with an arc-shaped compaction working surface 39. Both sides of the fan-shaped compaction plate 37 are provided with clearance recesses 310. The clearance recesses 310 are used to avoid the stems of the seedlings and prevent damage to the seedlings during the compaction process. The arc-shaped compaction working surface 39 makes the soil force evenly distributed, avoiding local over- or under-compaction and ensuring consistent soil density. The clearance recesses 310 on both sides can accurately avoid the stems of the seedlings. With the rotational freedom of the swing arm 36, even if there is a slight deviation in the movement path of the device, the seedlings will not be broken or damaged. This fundamentally solves the problem that traditional compaction equipment is prone to damaging seedlings. like Figure 1 as well as Figures 4-5As shown, a pressure regulating component 4 is provided on the top of the first mounting beam 34. The pressure regulating component 4 includes a support base 41 fixedly connected to the top of the first mounting beam 34, and a limiting rod 42 fixedly connected to the top of the mounting base 35. The limiting rod 42 slides through the first mounting beam 34, and a return spring 43 is sleeved on the outer side of the limiting rod 42. The two ends of the return spring 43 abut against the inner walls of the mounting base 35 and the first mounting beam 34, respectively. The return spring 43 provides elastic support for the mounting base 35, enabling the entire compaction unit to float up and down, adapting to the undulations of the seedbed ground, and ensuring that every soil area receives stable compaction pressure. The limiting rod 42 restricts the floating range of the mounting base 35. To prevent lateral displacement and torsion, and to improve the stability and reliability of the structure, a hydraulic cylinder 44 is fixedly installed on the support base 41. The piston rod of the hydraulic cylinder 44 is connected to the top of the limit rod 42. A pressure sensor 45 is installed on the side of the support base 41 near the limit rod 42 to detect the compaction pressure in real time and feed it back to the control system. The hydraulic cylinder 44 changes the compression of the return spring 43 by pushing the limit rod 42, which can precisely and steplessly adjust the compaction pressure to meet the differentiated compaction needs of different seedling varieties and different soil textures. The pressure sensor 45 collects pressure data in real time and feeds it back to the control system to realize closed-loop automatic control of compaction pressure and ensure the consistency of compaction mass during operation. like Figure 1 , Figure 4 as well as Figure 7 As shown, an auxiliary compaction component 5 is provided on the outer bottom of the second rotating frame 32. The auxiliary compaction component 5 includes a second mounting beam 51 connected to the second rotating frame 32. An mounting shaft 52 is connected to the side of the second mounting beam 51 near the bottom. A compaction roller 53 is rotatably mounted on the mounting shaft 52. After the fan-shaped soil compaction plate 37 completes the initial elastic compaction, the compaction roller 53 performs a second continuous rolling of the soil to further improve the overall soil density, making the seedling roots more tightly bonded to the soil particles, effectively preventing the roots from being suspended and losing water. The soil surface after rolling is smoother, which is beneficial for subsequent irrigation and seedling growth management. An eccentric block 54 is fixedly installed on one side. The eccentric block 54 vibrates as the compaction roller 53 rotates, which enhances the compaction effect. One end of the crushing roller 210 is connected to a drive motor 55, which is fixed on the second mounting beam 51. The eccentric block 54 rotates synchronously with the compaction roller 53 to generate high-frequency micro-vibration, which causes the soil particles to rearrange and fill the gaps under the action of vibration, significantly improving the compaction effect and reducing the number of operations. The drive motor 55 provides an independent power source for the compaction roller 53, ensuring that the compaction roller 53 has sufficient speed and torque to perform secondary compaction of the soil through vibration, causing the soil particles to rearrange and fill the gaps, further improving the density.

[0027] Working principle: like Figures 1-7As shown, when this device is working, the frame 1 is connected to a tractor or other power equipment via the front traction structure. The entire machine is supported by the traveling wheels 22 on the support arm 21 and moves at a constant speed along the seedbed. Before operation, the first hydraulic push rod 25 extends and retracts to drive the first rotating frame 24 to pitch and rotate around the first support 23, precisely adjusting the soil penetration depth of the crushing roller 210. The second hydraulic push rod 27 precisely controls the horizontal swing angle of the rotating seat 26, finely adjusting the working posture and cutting angle of the crushing roller 210, and precisely matching the slope of the seedbed and local terrain changes. To optimize the crushing stress state and avoid incomplete or excessive crushing, the third hydraulic push rod 33 adjusts the pitch angle of the second rotating frame 32, sets the initial working height of the fan-shaped soil pressing plate 37, and the hydraulic cylinder 44 pushes the limit rod 42 to compress the reset spring 43, preset the initial compaction pressure. During operation, the crushing roller 210 rotates synchronously with the device to crush the compacted soil on the surface of the seedbed. The cleaning brush 213 is in real-time contact with the surface of the crushing roller 210 to continuously scrape off the wet soil adhering to the roller body and prevent soil clumps from clogging the crushing teeth. The baffle 214 effectively blocks soil particles splashed during the crushing process and simultaneously levels the crushed soil, creating favorable conditions for subsequent compaction. As the device continues to move forward, multiple independently mounted swing arms 36, under the pre-pressure of the pre-tension springs 38, drive the fan-shaped soil compaction plates 37 to adapt to the uneven ground. The arc-shaped compaction working surface 39 uniformly and elastically compacts the soil, while the side clearance recesses 310 precisely avoid the seedling stems. With the rotation buffer of the swing arms 36, even if the travel path deviates slightly, the seedlings will not be damaged. The pressure sensor 45 collects the compaction pressure data in real time and feeds it back to the control system, automatically adjusting the extension and retraction of the hydraulic cylinder 44 to achieve closed-loop automatic control of the compaction pressure. Finally, the compaction roller 53 of the auxiliary compaction component 5 rotates at high speed under the drive of the independent drive motor 55, and the internal eccentric block 54 rotates synchronously to generate high-frequency micro-vibration, vibrating and compacting the soil a second time. This rearranges the soil particles to fill the gaps, further improving the density and allowing the seedling roots to fully and tightly combine with the soil, completing all the soil covering and compaction operations.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A soil compaction device for cultivating forestry seedlings, comprising a frame (1), characterized in that, It also includes a compacted soil breaking component (2) and an independent elastic overlay component (3): The compacted soil breaking assembly (2) includes a support arm (21) connected to a frame (1), a walking wheel (22) installed on the support arm (21), a first support (23) connected to one side of the frame (1), a first rotating frame (24) rotatably connected to the bottom of the first support (23), a first hydraulic push rod (25) for adjusting the pitch angle of the first rotating frame (24) connected between the first support (23) and the first rotating frame (24), a rotating seat (26) rotatably connected to both ends of the first rotating frame (24), a support arm (29) provided on the rotating seat (26), and a breaking roller (210) rotatably installed at the bottom of the support arm (29). The independent elastic pressing assembly (3) includes a second bracket (31) connected to the other side of the frame (1). The bottom of the second bracket (31) is rotatably connected to a second rotating frame (32). A third hydraulic push rod (33) for adjusting the pitch angle of the second rotating frame (32) is connected between the second bracket (31) and the second rotating frame (32). The bottom of the second rotating frame (32) is connected to a first mounting beam (34). Multiple mounting seats (35) are provided in the first mounting beam (34). A swing arm (36) is rotatably connected to each mounting seat (35). A fan-shaped soil pressing plate (37) is rotatably connected to the bottom of the swing arm (36). A pre-tensioning spring (38) is connected between the mounting seat (35) and the swing arm (36).

2. The soil compaction device for cultivating forestry seedlings according to claim 1, characterized in that: A second hydraulic push rod (27) is connected between the first rotating frame (24) and the rotating seat (26). One end of the second hydraulic push rod (27) is rotatably mounted on the first rotating frame (24), and the other end of the second hydraulic push rod (27) is rotatably connected to the rotating seat (26) for adjusting the horizontal swing angle of the support arm (29). A connecting seat (28) is connected to the rotating seat (26), and the support arm (29) is connected to the connecting seat (28).

3. The soil compaction device for cultivating forestry seedlings according to claim 1, characterized in that: A connecting shaft (211) is connected to the crushing roller (210), and the connecting shaft (211) is connected inside the support arm (29). A connecting frame (212) is connected to the support arm (29) near the bottom. A cleaning brush (213) is connected to the connecting frame (212) near the crushing roller (210). The bristles of the cleaning brush (213) are in contact with the outer surface of the crushing roller (210) to clean the soil adhering to the crushing roller (210). A baffle (214) is connected to the connecting frame (212) near the bottom to block the soil splashed during the crushing process.

4. The soil covering and compaction device for cultivating forestry seedlings according to claim 1, characterized in that: The bottom of the fan-shaped compaction plate (37) is provided with an arc-shaped compaction working surface (39). Both sides of the fan-shaped compaction plate (37) are provided with clearance recesses (310). The clearance recesses (310) are used to avoid the stems of the seedlings and prevent damage to the seedlings during the compaction process.

5. The soil compaction device for cultivating forestry seedlings according to claim 1, characterized in that: A pressure regulating component (4) is provided on the top of the first mounting beam (34). The pressure regulating component (4) includes a support seat (41) fixedly connected to the top of the first mounting beam (34). A limit rod (42) is fixedly connected to the top of the mounting seat (35). The limit rod (42) slides through the first mounting beam (34). A return spring (43) is sleeved on the outside of the limit rod (42). The two ends of the return spring (43) abut against the inner wall of the mounting seat (35) and the first mounting beam (34), respectively.

6. The soil compaction device for cultivating forestry seedlings according to claim 5, characterized in that: A hydraulic cylinder (44) is fixedly installed on the support base (41). The piston rod of the hydraulic cylinder (44) is connected to the top of the limiting rod (42). A pressure sensor (45) is installed on the side of the support base (41) near the limiting rod (42) to detect the compaction pressure in real time and feed it back to the control system.

7. The soil compaction device for cultivating forestry seedlings according to claim 1, characterized in that: An auxiliary compaction assembly (5) is provided on the outer bottom of the second rotating frame (32). The auxiliary compaction assembly (5) includes a second mounting beam (51) connected to the second rotating frame (32). An mounting shaft (52) is connected to the side of the second mounting beam (51) near the bottom. A compaction roller (53) is rotatably mounted on the mounting shaft (52).

8. The soil covering and compaction device for cultivating forestry seedlings according to claim 7, characterized in that: An eccentric block (54) is fixedly installed on one side of the compaction roller (53). The eccentric block (54) vibrates as the compaction roller (53) rotates, which is used to enhance the compaction effect. One end of the compaction roller (53) is connected to a drive motor (55), which is fixed on the second mounting beam (51).

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